2 X SVT410he + PF500?

As in the tittle: 2 SVT410he's paired with a PF500, anyone have it or done it? I have one 410he already, but with a Nemesis EN400 on top and a Warwick Rockbass Corvette from '05, and it sounds so-so to say the least. The Eden is 'okay' and can get pretty dark sounding, in fact it sounds pretty dark most of the time and that's a quality to my ears. But I'm letting go of it, it's just not 'there' for me. What I've heard of the PF500 (currently my first choice as I don't and will not have the cash for a 7 Pro) is really good and a leap forward over the Nemesis. I would be adding a second 410he to get that 810 sound. What would that require of the PF500 in terms of power? Would it still sound great with the volume pushed to the limit? Or would it sound just as if it's on the limit? We're doing small venues mostly so anything close to 500 watts is more than enough.

I don't know that much of amps and cabs to answer this myself, so what say you?